VIVAS Co.

General Description, Design Features and Operational Characteristics:

This extractor was created based on German technology with innovations protected by Chinese patent. It is a new type of extractor that incorporates the most progressive vision and implementation of technical and economic requirements for equipment of this type from the perspective of maximum operational efficiency.

Extractor's sliding cell

Consists of two horizontally arranged levels: upper and lower extraction zones, through which frame cells (also called baskets) with the material to be extracted move (slide, see explanation below). The main working part of this extractor is the frame cell, while a perforated belt conveyor (as used in belt extractors from a well-known European manufacturer) is not used for traction. Instead, the cells slide along a stationary grating, moving the contained material for subsequent solvent spraying.

The external parts of both sides of the frame cell are equipped with pins, thanks to which each cell performs its horizontal movement (essentially sliding with minimal resistance) along the lower part of the grating of both upper and lower levels.

Extractor construction

Principle scheme of extractor

When the upper level cell reaches the middle of its working cycle, the material in it is discharged by gravity into the corresponding cell moving at the lower level. The material-free upper level cell turns over for subsequent movement at the lower level and, in turn, is ready to receive discharged material from the approaching upper level cell. Material leaching continues during the movement of cells at the lower level to the discharge port; as a result, cells are freed from miscella-depleted material; then the emptied cells move to the upper level to receive a new portion of material. The cycle is completed, a new one begins, etc.

• Continuous series of cells moving along roller guides to transport the extracted material through upper and lower stationary screens.
• The extractor design ensures effective countercurrent interaction of solvent/miscella and material.
• The height of the frame cell is only 0.5–0.8 meters, material layer in the cell from 0.4–0.65 m. Such a thin material layer in the cell provides a large contact area with the solvent and maximum drainage.
• Extended drainage zone before material discharge from the extractor ensures low solvent transfer to the extracted meal before sending it to the toaster.

Self-cleaning V-profile screen plates

The lower part of the grating of both upper and lower extraction zones is divided into upper and lower layers, assembled from a series of V-shaped wire screens with gap width from 0.4 to 1.2 mm (depending on the oil-bearing crop being extracted). Every 4–6 cells in the lower part of the grating there is a miscella collector, and material spraying with solvent is carried out by a total of 6–8 circulation pumps.

• Unique design device automatically controls material feeding and provides vapor-tight isolation.
• Feed screws with variable speed drives ensure uniform material feeding into each cell across the entire width and allow flexible variation of filling level.
• Sealed cells enable maintaining a certain miscella level above the material in each cell, optimizing soaking and percolation rates.
• Product redistribution from upper to lower cells prevents channeling, resulting in low and uniform residual oil content in the extracted meal.
• Clean, additionally self-filtering in the layer, miscella enhances protection and efficiency of distillation equipment.
• Multiple extraction stages, each containing a series of spray tubes, is one of the main advantages of this extractor type when processing low-quality oilseeds with poor percolation.

Residual Vegetable Oil Content in Meal

Residual vegetable oil content in meal when using this type of extractor (depending on raw material oil content and material preparation degree)

Frame Chain Extractor System

Extractor system

Extractor system 1

Extractor system 2

Extractor system 3